Updated On: 8/18/2026 - 8:10 AM
Click on each day to view forecast.
Tuesday Forecast:
PM10
39 AQI
24-hr Avg: 42 µg/m3
24-hr Avg: 42 µg/m3
Wednesday Forecast:
PM10
42 AQI
24-hr Avg: 45 µg/m3
24-hr Avg: 45 µg/m3
Thursday Forecast:
PM10
39 AQI
24-hr Avg: 42 µg/m3
24-hr Avg: 42 µg/m3
Friday Forecast:
PM10
35 AQI
24-hr Avg: 38 µg/m3
24-hr Avg: 38 µg/m3
Saturday Forecast:
PM10
33 AQI
24-hr Avg: 36 µg/m3
24-hr Avg: 36 µg/m3
Air Quality By Pollutant:
Pollutant
Tuesday
8/18/2026
8/18/2026
Wednesday
8/19/2026
8/19/2026
Thursday
8/20/2026
8/20/2026
Friday
8/21/2026
8/21/2026
Saturday
8/22/2026
8/22/2026
PM10
39
42
39
35
33
Pollutant
TUE
WED
THU
FRI
SAT
PM10
39
42
39
35
33
O3 = Ozone, PM10 = Particles ≤ 10 microns, PM2.5 = Particles ≤ 2.5 microns
Forecast Discussion:
A low-grade monsoon pattern is expected for Arizona over the next couple days. However, as moisture increases later in the week, the monsoon should gain a bit more momentum. Any given evening/night, winds from distant or nearby thunderstorms could conceivably move into the Rillito area. Chances for storms and/or rain will also be possible any afternoon, but will be best later in the week.
Air quality-wise, not much is expected to change from yesterday. PM10 (dust) will be mostly locally driven in the mornings, when conditions are calm. But, we can't rule out pockets of dust when storm winds affect the area in the afternoons/evenings.
For now, PM10 is forecast in the Good AQI category each day.
Check back tomorrow for the latest.
- M. Graves
ADEQ Meteorologist
Air quality-wise, not much is expected to change from yesterday. PM10 (dust) will be mostly locally driven in the mornings, when conditions are calm. But, we can't rule out pockets of dust when storm winds affect the area in the afternoons/evenings.
For now, PM10 is forecast in the Good AQI category each day.
Check back tomorrow for the latest.
- M. Graves
ADEQ Meteorologist
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